Remote Automated Weather Stations (RAWS) - Information about the use of these units from the U.S. Department of the Forest Service and BLM. - http://www.fs.fed.us/raws/
National Weather Service - United States national, regional and local forecasts, warning and advisory messages, storm tracking, radar and satellite images. Links to library, education and archives. Also in Spanish. - http://www.nws.noaa.gov/
Forecast Systems Laboratory - Demonstration of New Forecast Products (EXPERIMENTAL) - http://www-md.fsl.noaa.gov/